1-acyl-1-(2-pyridinyl)semicarbazides

Abstract

5-Alkyl-1-(2-pyridinyl)-1H-1,2,4-triazol-3-ols are prepared in good yield by reacting an appropriate 1-acyl-1-(2-pyridinyl)-semicarbazide with a base in the presence of a non-nucleophilic solvent. The compounds so prepared are intermediates used in the preparation of insecticides. The starting semicarbazide materials are novel compounds.

We claim: 
     
       1. A compound of the formula ##STR10## wherein R represents C 1  -C 4  alkyl; each X independently represents Cl, F, Br, NO 2 , C 1  -C 4  alkyl, NH 2 , mono- or dialkylamino wherein each alkyl contains from 1 to 4 carbon atoms, C 1  -C 4  alkoxy, C 1  -C 4  alkylthio, C 1  -C 4  alkylsulfinyl, C 1  -C 4  alkylsulfonyl, CN, CF 3 , CCl 3 , phenoxy or substituted phenoxy of the formula ##STR11##   wherein each Z independently represents Cl, F, Br, NO 2 , CN, C 1  -C 4  alkoxy, C 1  -C 4  alkylthio, with the proviso that when either n is 2 or 3, all X groups are sterically compatible with each other and all Z groups are sterically compatible with each other; and each n independently represents an integer of from 0 to 3, inclusive.     
     
     
       2. The compound of claim 1 wherein n is 0.